Too stressed and anxious. Nothing going the way I wanted it to.

Welcome to the real life!

[b]Hold on, bad times pass, too [/b];)

Try some walking / any sport and deep breathing - it may not work right away, but in time, it did for me.
When your mind is overwhelmed, take small steps and do something with your hands - it will put your thoughts in order or at least give you some space to think.

I wonder how, I wonder why, yesterday u told me about the blue blue sky and all that I can see is just another lemon tree

What exactly is the main thing that you want right now? Pretend I'm nobody.